{"id":19290,"date":"2025-07-07T04:05:05","date_gmt":"2025-07-06T21:05:05","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=19290"},"modified":"2025-07-08T08:05:08","modified_gmt":"2025-07-08T01:05:08","slug":"thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/","title":{"rendered":"Th\u1ea5u k\u00ednh ph\u00e2n k\u00ec l\u00e0 g\u00ec? \u0110\u1eb7c \u0111i\u1ec3m, c\u00e1ch v\u1ebd, \u1ee9ng d\u1ee5ng v\u00e0 b\u00e0i t\u1eadp (V\u1eadt l\u00fd 9)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Ong_kinh_phan_ky_la_gi\" >\u1ed0ng k\u00ednh ph\u00e2n k\u1ef3 l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Dac_diem_cua_ong_kinh_khac_nhau\" >\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Truc_chinh_Quang_Tam_Focus_tieu_cu_cua_ong_kinh_khac_nhau\" >Tr\u1ee5c ch\u00ednh, Quang Tam, Focus, ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Truc_chinh_cua_ong_kinh_phan_ky\" >Tr\u1ee5c ch\u00ednh c\u1ee7a \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Toi_uu_cua_ong_kinh_phan_ky\" >T\u1ed1i \u01b0u c\u1ee7a \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Trong_tam_cua_ong_kinh_khac_nhau\" >Tr\u1ecdng t\u00e2m c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Do_dai_tieu_cu_cua_phan_ky_ong_kinh\" >\u0110\u1ed9 d\u00e0i ti\u00eau c\u1ef1 c\u1ee7a ph\u00e2n k\u1ef3 \u1ed1ng k\u00ednh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Cach_ve_ong_kinh_phan_ky\" >C\u00e1ch v\u1ebd \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Anh_cua_mot_vat_the_that_thong_qua_cac_ong_kinh_khac_nhau\" >\u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt th\u1ec3 th\u1eadt th\u00f4ng qua c\u00e1c \u1ed1ng k\u00ednh kh\u00e1c nhau<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Ap_dung_su_khac_biet_trong_cuoc_song\" >\u00c1p d\u1ee5ng s\u1ef1 kh\u00e1c bi\u1ec7t trong cu\u1ed9c s\u1ed1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Bai_tap_phan_ky_lop_9\" >B\u00e0i t\u1eadp ph\u00e2n k\u1ef3 l\u1edbp 9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Ap_dung_ong_kinh_phan_ky_trong_thuc_te\" >\u00c1p d\u1ee5ng \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 trong th\u1ef1c t\u1ebf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ckconitsha.com\/vn\/thau-kinh-phan-ki-la-gi-dac-diem-cach-ve-ung-dung-va-bai-tap-vat-ly-9\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p dir=\"ltr\">\u1ed0ng k\u00ednh ph\u00e2n k\u1ef3 l\u00e0 m\u1ed9t trong nh\u1eefng n\u1ed9i dung quan tr\u1ecdng trong ph\u1ea7n h\u00ecnh h\u1ecdc. V\u1eady \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3, t\u00ednh ch\u1ea5t v\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 v\u1ebd \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 kh\u00e1c v\u1edbi c\u00e1c lo\u1ea1i th\u1ee7y tinh kh\u00e1c l\u00e0 g\u00ec? H\u00e3y t\u00ecm hi\u1ec3u th\u00f4ng qua b\u00e0i vi\u1ebft sau \u0111\u00e2y.<\/p>\n<p>                                                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img_default\/monkey3.png\" alt=\"\"><\/p>\n<p class=\"title\">H\u00e0ng tri\u1ec7u tr\u1ebb em \u0111\u00e3 ph\u00e1t tri\u1ec3n c\u00e1c k\u1ef9 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a ch\u00fang th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a kh\u1ec9<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 c\u00e1c s\u1ea3n ph\u1ea9m v\u00e0 tuy\u1ebfn h\u1ecdc h\u1ecdc cho tr\u1ebb em.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra t\u00ean \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a b\u1ea1n *Vui l\u00f2ng ki\u1ec3m tra s\u1ed1 \u0111i\u1ec7n tho\u1ea1i h\u01a1n 2.000 t\u1eeb &amp; 6.000 c\u00e2u ti\u1ebfng Anh \u0111\u1ec3 ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n 4 k\u1ef9 n\u0103ng ti\u1ebfng Anh t\u1ed1t &#8211; ti\u1ebfng Anh theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7n \u0111\u1ea1i ph\u00e1t tri\u1ec3n kh\u1ea3 n\u0103ng EQ &amp; Vi\u1ec7t Nam *B\u1ea1n ch\u01b0a ch\u1ecdn b\u1ea5t k\u1ef3 m\u1ee5c n\u00e0o! \u0110\u0103ng k\u00fd t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ong_kinh_phan_ky_la_gi\"><\/span>\u1ed0ng k\u00ednh ph\u00e2n k\u1ef3 l\u00e0 g\u00ec? <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u1ed0ng k\u00ednh ph\u00e2n k\u1ef3, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u1ed1ng k\u00ednh c\u1ea1nh d\u00e0y, l\u00e0 m\u1ed9t kh\u1ed1i trong su\u1ed1t (th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng nh\u1ef1a ho\u1eb7c th\u1ee7y tinh), l\u00e0 \u0111\u1ed3ng nh\u1ea5t v\u00e0 b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi m\u1ed9t b\u1ec1 m\u1eb7t l\u00f5m k\u1ebft h\u1ee3p m\u1eb7t ph\u1eb3ng. Ngo\u00e0i ra, \u1ed1ng k\u00ednh kh\u00e1c nhau c\u00f3 th\u1ec3 b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi hai b\u00ean l\u00f5m.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/thau-kinh-phan-ki-2.jpg\" alt=\"\u1ed0ng k\u00ednh ph\u00e2n k\u1ef3. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dac_diem_cua_ong_kinh_khac_nhau\"><\/span>\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u1ed0ng k\u00ednh c\u1ea1nh d\u00e0y s\u1ebd c\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u1ed0ng k\u00ednh ph\u00e2n k\u1ef3 th\u00f4ng th\u01b0\u1eddng s\u1ebd h\u01a1i m\u1ecfng h\u01a1n c\u1ea1nh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Khi m\u1ed9t ch\u00f9m tia \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb song song v\u1edbi tr\u1ee5c c\u1ee7a \u1ed1ng k\u00ednh v\u00e0 vu\u00f4ng g\u00f3c v\u1edbi b\u1ec1 m\u1eb7t c\u1ee7a \u1ed1ng k\u00ednh \u0111\u00f3, ch\u00f9m tia s\u1ebd xu\u1ea5t hi\u1ec7n \u0111a d\u1ea1ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Khi s\u1eed d\u1ee5ng \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 \u0111\u1ec3 quan s\u00e1t, ch\u00fang ta s\u1ebd th\u1ea5y r\u1eb1ng \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c quan s\u00e1t nh\u1ecf h\u01a1n so v\u1edbi khi ch\u00fang ta nh\u00ecn m\u00e0 kh\u00f4ng c\u00f3 th\u1ee7y tinh.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Truc_chinh_Quang_Tam_Focus_tieu_cu_cua_ong_kinh_khac_nhau\"><\/span>Tr\u1ee5c ch\u00ednh, Quang Tam, Focus, ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">C\u00e1c kh\u00e1i ni\u1ec7m quan tr\u1ecdng v\u1ec1 s\u1ef1 kh\u00e1c bi\u1ec7t c\u1ea7n nh\u1edb <\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Truc_chinh_cua_ong_kinh_phan_ky\"><\/span>Tr\u1ee5c ch\u00ednh c\u1ee7a \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 <span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Tr\u1ee5c ch\u00ednh c\u1ee7a m\u1ed9t \u1ed1ng k\u00ednh kh\u00e1c nhau l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng \u0111i qua trung t\u00e2m. \u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a tr\u1ee5c vu\u00f4ng g\u00f3c v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c kh\u00eda c\u1ea1nh tr\u00ean \u1ed1ng k\u00ednh.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Toi_uu_cua_ong_kinh_phan_ky\"><\/span>T\u1ed1i \u01b0u c\u1ee7a \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 <span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trung t\u00e2m c\u1ee7a \u1ed1ng k\u00ednh th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1edfi O. Trung t\u00e2m l\u00e0 trung t\u00e2m c\u1ee7a \u1ed1ng k\u00ednh, n\u01a1i m\u1ecdi tia s\u00e1ng s\u1ebd \u0111\u01b0\u1ee3c truy\u1ec1n tr\u1ef1c ti\u1ebfp. <\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Trong_tam_cua_ong_kinh_khac_nhau\"><\/span>Tr\u1ecdng t\u00e2m c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau <span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Tr\u1ecdng t\u00e2m c\u1ee7a \u1ed1ng k\u00ednh \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u l\u00e0 F v\u00e0 F &#039;. Tr\u1ecdng t\u00e2m l\u00e0 s\u1ef1 h\u1ed9i t\u1ee5 c\u1ee7a c\u00e1c d\u1ea7m \u00e1nh s\u00e1ng qua k\u00ednh v\u00e0 \u0111i qua ph\u1ea7n m\u1edf r\u1ed9ng c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Do_dai_tieu_cu_cua_phan_ky_ong_kinh\"><\/span>\u0110\u1ed9 d\u00e0i ti\u00eau c\u1ef1 c\u1ee7a ph\u00e2n k\u1ef3 \u1ed1ng k\u00ednh <span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ed9 d\u00e0i ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u l\u00e0 f. Vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 d\u00e0i ti\u00eau c\u1ef1 l\u00e0 t\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch t\u1eeb ti\u00eau \u0111i\u1ec3m c\u1ee7a \u1ed1ng k\u00ednh \u0111\u1ebfn trung t\u00e2m.<\/p>\n<p dir=\"ltr\">T\u1ea1o \u0111i\u1ec1u ki\u1ec7n: c\u1ee7a = c\u1ee7a \u2032 = f<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_ve_ong_kinh_phan_ky\"><\/span>C\u00e1ch v\u1ebd \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u1ed0ng k\u00ednh kh\u00e1c nhau \u0111\u01b0\u1ee3c v\u1ebd nh\u01b0 sau: <\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/thau-kinh-phan-ki-3.jpg\" alt=\"Bi\u1ec3u t\u01b0\u1ee3ng c\u1ee7a \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Anh_cua_mot_vat_the_that_thong_qua_cac_ong_kinh_khac_nhau\"><\/span>\u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt th\u1ec3 th\u1eadt th\u00f4ng qua c\u00e1c \u1ed1ng k\u00ednh kh\u00e1c nhau <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a h\u00ecnh \u1ea3nh \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi c\u00e1c \u1ed1ng k\u00ednh kh\u00e1c nhau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111\u1eb7t r\u1ea5t xa so v\u1edbi \u1ed1ng k\u00ednh, vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c ch\u00ednh v\u00e0 t\u1ea1o ra h\u00ecnh \u1ea3nh c\u0169ng s\u1ebd vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c ch\u00ednh c\u1ee7a \u1ed1ng k\u00ednh chuy\u1ec3n h\u01b0\u1edbng. <\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh \u1ea3nh \u1ea3o c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 kho\u1ea3ng c\u00e1ch chi\u1ec1u d\u00e0i t\u1eeb \u1ed1ng k\u00ednh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ed1i t\u01b0\u1ee3ng \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf b\u1ea5t k\u1ef3 v\u1ecb tr\u00ed n\u00e0o ph\u00eda tr\u01b0\u1edbc \u1ed1ng k\u00ednh chuy\u1ec3n h\u01b0\u1edbng lu\u00f4n t\u1ea1o ra h\u00ecnh \u1ea3nh \u1ea3o, nh\u1ecf h\u01a1n \u0111\u1ed1i t\u01b0\u1ee3ng, c\u00f9ng h\u01b0\u1edbng v\u1edbi \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 lu\u00f4n \u1edf \u0111\u1ed9 d\u00e0i ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau.<\/p>\n<\/li>\n<\/ul>\n<p>Thu\u1ed9c t\u00ednh h\u00ecnh \u1ea3nh c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau:<\/p>\n<ul>\n<li>V\u1ecb tr\u00ed: H\u00ecnh \u1ea3nh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng lu\u00f4n n\u1eb1m trong ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh (F &#039;<\/li>\n<li>K\u00edch th\u01b0\u1edbc h\u00ecnh \u1ea3nh: H\u00ecnh \u1ea3nh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng lu\u00f4n nh\u1ecf h\u01a1n \u0111\u1ed1i t\u01b0\u1ee3ng (H &#039;<\/li>\n<li>\u1ea2nh bu\u1ed5i chi\u1ec1u: H\u00ecnh \u1ea3nh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng lu\u00f4n theo c\u00f9ng m\u1ed9t h\u01b0\u1edbng v\u1edbi \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li>\n<li>Thu\u1ed9c t\u00ednh h\u00ecnh \u1ea3nh: H\u00ecnh \u1ea3nh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 h\u00ecnh \u1ea3nh \u1ea3o, kh\u00f4ng th\u1ec3 b\u1eaft \u0111\u01b0\u1ee3c tr\u00ean m\u00e0n h\u00ecnh.<\/li>\n<\/ul>\n<p>=&gt; V\u1eady, \u1ed1ng k\u00ednh h\u00ecnh \u1ea3nh n\u00e0o cho? \u1ed0ng k\u00ednh ph\u00e2n k\u1ef3 cho h\u00ecnh \u1ea3nh \u1ea3o, c\u00f9ng m\u1ed9t h\u01b0\u1edbng, nh\u1ecf h\u01a1n v\u1eadt th\u1ec3 v\u00e0 lu\u00f4n lu\u00f4n n\u1eb1m trong ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<p dir=\"ltr\">C\u00e1ch x\u00e2y d\u1ef1ng h\u00ecnh \u1ea3nh c\u1ee7a m\u1ed9t \u0111i\u1ec3m s\u00e1ng \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi m\u1ed9t \u1ed1ng k\u00ednh kh\u00e1c nhau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u1eeb \u0111i\u1ec3m S, x\u00e2y d\u1ef1ng 2 tr\u00ean 3 tia s\u00e1ng \u0111\u1eb7c bi\u1ec7t \u0111\u1ebfn \u1ed1ng k\u00ednh, sau \u0111\u00f3 m\u1edf r\u1ed9ng 2 tia \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t tia t\u1eeb \u1ed1ng k\u00ednh<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Giao \u0111i\u1ec3m c\u1ee7a hai tia l\u00e0 h\u00ecnh \u1ea3nh th\u1eadt c\u1ee7a S. M\u1eb7t kh\u00e1c, giao \u0111i\u1ec3m c\u1ee7a hai \u0111\u01b0\u1eddng m\u1edf r\u1ed9ng c\u1ee7a hai tia l\u00e0 h\u00ecnh \u1ea3nh \u1ea3o S &#039;c\u1ee7a \u0111i\u1ec3m S.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/thau-kinh-phan-ki-4.jpg\" alt=\"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e2y d\u1ef1ng h\u00ecnh \u1ea3nh th\u00f4ng qua \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u00e1ch x\u00e2y d\u1ef1ng h\u00ecnh \u1ea3nh c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u00e1nh s\u00e1ng AB \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi m\u1ed9t \u1ed1ng k\u00ednh kh\u00e1c nhau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ec3 x\u00e2y d\u1ef1ng h\u00ecnh \u1ea3nh c\u1ee7a \u00e1nh s\u00e1ng AB qua \u1ed1ng k\u00ednh (bi\u1ebft AB vu\u00f4ng g\u00f3c v\u1edbi \u1ed1ng k\u00ednh, \u0111i\u1ec3m A n\u1eb1m tr\u00ean tr\u1ee5c ch\u00ednh), ch\u00fang t\u00f4i ti\u1ebfn h\u00e0nh x\u00e2y d\u1ef1ng h\u00ecnh \u1ea3nh B &#039;c\u1ee7a \u0111i\u1ec3m B b\u1eb1ng hai trong s\u1ed1 ba tia s\u00e1ng \u0111\u1eb7c bi\u1ec7t.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Sau \u0111\u00f3, vu\u00f4ng g\u00f3c th\u1ea5p h\u01a1n t\u1eeb b &#039;\u0111\u1ebfn tr\u1ee5c ch\u00ednh, ch\u00fang t\u00f4i \u0111\u00e3 thu \u0111\u01b0\u1ee3c m\u1ed9t&#039; h\u00ecnh \u1ea3nh c\u1ee7a \u0111i\u1ec3m A.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/thau-kinh-phan-ki-5.jpg\" alt=\"C\u00e1ch x\u00e2y d\u1ef1ng h\u00ecnh \u1ea3nh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng \u00e1nh s\u00e1ng AB \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi m\u1ed9t \u1ed1ng k\u00ednh kh\u00e1c nhau. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5189%\">\n<p style=\"text-align: center\">Gi\u00fap con b\u1ea1n h\u1ecdc to\u00e1n k\u1ebft h\u1ee3p v\u1edbi ti\u1ebfng Anh si\u00eau ti\u1ebft ki\u1ec7m ch\u1ec9 tr\u00ean \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc kh\u1ec9. V\u1edbi n\u1ed9i dung gi\u1ea3ng d\u1ea1y v\u1ea1n n\u0103ng \u0111\u1ec3 gi\u00fap tr\u1ebb ph\u00e1t tri\u1ec3n t\u01b0 duy n\u00e3o b\u1ed9 v\u00e0 ng\u00f4n ng\u1eef to\u00e0n di\u1ec7n ch\u1ec9 v\u1edbi kho\u1ea3ng 2k\/ng\u00e0y.<\/p>\n<p style=\"text-align: center\">\n<p><img decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/thamgiangay.png\" alt=\"\" width=\"185\"><\/p>\n<\/td>\n<\/tr>\n<\/table>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ap_dung_su_khac_biet_trong_cuoc_song\"><\/span>\u00c1p d\u1ee5ng s\u1ef1 kh\u00e1c bi\u1ec7t trong cu\u1ed9c s\u1ed1ng <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u1ed0ng k\u00ednh ph\u00e2n chia c\u00f3 c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Thay \u0111\u1ed5i ch\u00f9m tia song song th\u00e0nh m\u1ed9t ch\u00f9m ph\u00e2n k\u1ef3.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u00e0i \u0111\u1eb7t t\u1ea7m nh\u00ecn \u0111\u1ec3 \u0111i\u1ec1u tr\u1ecb t\u1ea7m nh\u00ecn (k\u00ednh) v\u00e0 \u00f4ng gi\u00e0<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1eed d\u1ee5ng tr\u00ean m\u1eaft tr\u00ean c\u1eeda nh\u00e0.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00e1c thi\u1ebft b\u1ecb k\u1ef9 thu\u1eadt \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t v\u1edbi c\u00e1c \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 nh\u01b0 k\u00ednh thi\u00ean v\u0103n, k\u00ednh hi\u1ec3n vi, quang ph\u1ed5, k\u00ednh vi\u1ec5n v\u1ecdng, v.v.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/thau-kinh-phan-ki-6_(1).jpg\" alt=\"\u00c1p d\u1ee5ng \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Xem th\u00eam: T\u00f3m t\u1eaft ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 hi\u1ec7n t\u01b0\u1ee3ng kh\u00fac x\u1ea1 \u00e1nh s\u00e1ng | Gi\u1ea3i c\u00e1c b\u00e0i t\u1eadp kh\u00fac x\u1ea1 \u00e1nh s\u00e1ng 11<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_phan_ky_lop_9\"><\/span>B\u00e0i t\u1eadp ph\u00e2n k\u1ef3 l\u1edbp 9 <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">M\u1ed9t ph\u1ea7n c\u1ee7a c\u00e1c \u1ed1ng k\u00ednh chuy\u1ec3n h\u01b0\u1edbng \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp d\u01b0\u1edbi \u0111\u00e2y s\u1ebd bao g\u1ed3m c\u00e1c c\u00e2u tr\u1ea3 l\u1eddi chi ti\u1ebft, gi\u00fap h\u1ecd so s\u00e1nh k\u1ebft qu\u1ea3 c\u1ee7a h\u1ecd m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c nh\u1ea5t sau khi th\u1ef1c hi\u1ec7n.<\/p>\n<p dir=\"ltr\">C\u00e2u 1: Ph\u00e2n k\u1ef3 \u1ed1ng k\u00ednh l\u00e0 lo\u1ea1i \u1ed1ng k\u00ednh:<\/p>\n<p dir=\"ltr\">A. C\u00e1c c\u1ea1nh d\u00e0y h\u01a1n gi\u1eefa.<\/p>\n<p dir=\"ltr\">B. c\u1ea1nh m\u1ecfng h\u01a1n gi\u1eefa.<\/p>\n<p dir=\"ltr\">C. Xoay ch\u00f9m tia song song v\u1edbi ch\u00f9m tia h\u1ed9i t\u1ee5.<\/p>\n<p dir=\"ltr\">D. c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng ch\u1ea5t r\u1eafn trong su\u1ed1t.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: a<\/p>\n<p dir=\"ltr\">C\u00e2u 2: Khi s\u1eed d\u1ee5ng \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 \u0111\u1ec3 quan s\u00e1t c\u00e1c t\u1eeb, ch\u00fang t\u00f4i nh\u1eadn th\u1ea5y:<\/p>\n<p dir=\"ltr\">A. C\u00e1c t\u1eeb l\u1edbn h\u01a1n khi nh\u00ecn v\u00e0o b\u00ecnh th\u01b0\u1eddng.<\/p>\n<p dir=\"ltr\">B. Nh\u1eefng t\u1eeb nh\u01b0 khi nh\u00ecn v\u00e0o b\u00ecnh th\u01b0\u1eddng.<\/p>\n<p dir=\"ltr\">C. V\u0103n b\u1ea3n nh\u1ecf h\u01a1n khi nh\u00ecn v\u00e0o b\u00ecnh th\u01b0\u1eddng.<\/p>\n<p dir=\"ltr\">D. kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y c\u00e1c t\u1eeb.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: c<\/p>\n<p dir=\"ltr\">C\u00e2u 3: chi\u1ebfu m\u1ed9t tia \u0111\u1ec3 song song v\u1edbi tr\u1ee5c ch\u00ednh c\u1ee7a \u1ed1ng k\u00ednh chuy\u1ec3n h\u01b0\u1edbng, ch\u00fang ta s\u1ebd c\u00f3 \u0111\u01b0\u1ee3c tia:<\/p>\n<p dir=\"ltr\">A. \u0110i qua tr\u1ecdng t\u00e2m c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<p dir=\"ltr\">B. C\u1eaft tr\u1ee5c ch\u00ednh c\u1ee7a \u1ed1ng k\u00ednh t\u1ea1i b\u1ea5t k\u1ef3 \u0111i\u1ec3m n\u00e0o.<\/p>\n<p dir=\"ltr\">C. Song song v\u1edbi tr\u1ee5c ch\u00ednh c\u1ee7a \u1ed1ng k\u00ednh<\/p>\n<p dir=\"ltr\">D. C\u00f3 m\u1ed9t d\u00f2ng m\u1edf r\u1ed9ng \u0111i qua ti\u00eau \u0111i\u1ec3m.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: d<\/p>\n<p dir=\"ltr\">C\u00e2u 4: Kho\u1ea3ng c\u00e1ch gi\u1eefa hai ti\u00eau \u0111i\u1ec3m c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau l\u00e0<\/p>\n<p dir=\"ltr\">A. \u0110\u1ed9 d\u00e0i ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<p dir=\"ltr\">B. Hai l\u1ea7n chi\u1ec1u d\u00e0i ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<p dir=\"ltr\">C. M\u1ed9t n\u1eeda chi\u1ec1u d\u00e0i ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<p dir=\"ltr\">D. b\u1ed1n l\u1ea7n chi\u1ec1u d\u00e0i ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: b<\/p>\n<p dir=\"ltr\">C\u00e2u 5: Tia \u00e1nh s\u00e1ng \u0111i qua \u1ed1ng k\u00ednh kh\u00e1c nhau nh\u01b0ng kh\u00f4ng thay \u0111\u1ed5i<\/p>\n<p dir=\"ltr\">A. C\u00e1c tia song song v\u1edbi tr\u1ee5c ch\u00ednh c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<p dir=\"ltr\">B. Tia \u0111\u1ebfn b\u1ea5t k\u1ef3 trung t\u00e2m quang h\u1ecdc n\u00e0o c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<p dir=\"ltr\">C. Ray \u0111\u1ebfn tr\u1ecdng t\u00e2m c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<p dir=\"ltr\">D. Tia nhang \u0111\u01b0\u1ee3c h\u01b0\u1edbng qua ti\u00eau \u0111i\u1ec3m (kh\u00e1c v\u1edbi tia \u0111\u1ebfn so v\u1edbi \u1ed1ng k\u00ednh) c\u1ee7a \u1ed1ng k\u00ednh.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: b<\/p>\n<p dir=\"ltr\">C\u00e2u 6: C\u00e1c tia song song v\u1edbi tr\u1ee5c ch\u00ednh c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau, t\u1ea1o ra tia s\u00e1ng ph\u1ea7n n\u00e0o v\u1edbi tr\u1ee5c ch\u00ednh t\u1ea1i \u0111i\u1ec3m quang quang quang c\u1ee7a \u1ed1ng k\u00ednh trong kho\u1ea3ng 15 cm. V\u00e0o th\u1eddi \u0111i\u1ec3m \u0111\u00f3, \u0111\u1ed9 l\u1edbn c\u1ee7a \u0111\u1ed9 d\u00e0i ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh n\u00e0y b\u1eb1ng:<\/p>\n<p dir=\"ltr\">A. 15 cm<\/p>\n<p dir=\"ltr\">B. 20 cm<\/p>\n<p dir=\"ltr\">C. 25 cm<\/p>\n<p dir=\"ltr\">D. 30 cm<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: a<\/p>\n<p dir=\"ltr\">B\u1edfi v\u00ec tia song song v\u1edbi tr\u1ee5c ch\u00ednh c\u1ee7a \u1ed1ng k\u00ednh, n\u00ean tia c\u00f3 ph\u1ea7n k\u00e9o d\u00e0i qua ti\u00eau \u0111i\u1ec3m. Do \u0111\u00f3, c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a chi\u1ec1u d\u00e0i ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng k\u00ednh n\u00e0y l\u00e0 15 cm<\/p>\n<p dir=\"ltr\">C\u00e2u 7: M\u1ed9t \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 c\u00f3 \u0111\u1ed9 d\u00e0i ti\u00eau c\u1ef1 25 cm. Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111i\u1ec3m F v\u00e0 F &#039;l\u00e0:<\/p>\n<p dir=\"ltr\">A. 12,5 cm<\/p>\n<p dir=\"ltr\">B. 25 cm<\/p>\n<p dir=\"ltr\">C. 37,5 cm<\/p>\n<p dir=\"ltr\">D. 50 cm<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: d<\/p>\n<p dir=\"ltr\">B\u1edfi v\u00ec ch\u00fang ta c\u00f3: f = of = of &#039;= 25 cm<\/p>\n<p dir=\"ltr\">Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111i\u1ec3m f v\u00e0 f &#039;l\u00e0 ff&#039;: ff &#039;= c\u1ee7a + c\u1ee7a&#039; = 25 + 25 = 50 (cm)<\/p>\n<p dir=\"ltr\">C\u00e2u 8: T\u00f3m l\u1ea1i qua trung t\u00e2m c\u1ee7a trung t\u00e2m c\u1ee7a \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 m\u1ed9t tia s\u00e1ng, bi\u1ebft r\u1eb1ng c\u00e1c tia s\u00e1ng kh\u00f4ng song song v\u1edbi tr\u1ee5c ch\u00ednh. V\u00e0o th\u1eddi \u0111i\u1ec3m \u0111\u00f3, tia s\u00e1ng n\u1ed5i l\u00ean t\u1eeb \u1ed1ng k\u00ednh s\u1ebd theo sau?<\/p>\n<p dir=\"ltr\">A. B\u1ea5t k\u1ef3 ph\u01b0\u01a1ng ph\u00e1p n\u00e0o.<\/p>\n<p dir=\"ltr\">B. H\u01b0\u1edbng b\u1ecb bi\u1ebfn d\u1ea1ng xa tr\u1ee5c ch\u00ednh so v\u1edbi tia s\u1eafp t\u1edbi.<\/p>\n<p dir=\"ltr\">C. H\u01b0\u1edbng b\u1ecb l\u1ec7ch g\u1ea7n tr\u1ee5c ch\u00ednh so v\u1edbi tia t\u1edbi.<\/p>\n<p dir=\"ltr\">D. H\u01b0\u1edbng c\u0169.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: d<\/p>\n<p dir=\"ltr\">Khi chi\u1ebfu m\u1ed9t tia s\u00e1ng qua O quang c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau, h\u01b0\u1edbng kh\u00f4ng song song v\u1edbi tr\u1ee5c ch\u00ednh. Tia \u00e1nh s\u00e1ng n\u1ed5i l\u00ean t\u1eeb \u1ed1ng k\u00ednh s\u1ebd \u0111i theo h\u01b0\u1edbng c\u0169 v\u00ec tr\u1ee5c ch\u00ednh c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau \u0111i qua \u0111i\u1ec3m o trong \u1ed1ng k\u00ednh n\u01a1i t\u1ea5t c\u1ea3 c\u00e1c tia s\u00e1ng qua \u0111i\u1ec3m n\u00e0y \u0111\u01b0\u1ee3c truy\u1ec1n tr\u1ef1c ti\u1ebfp, m\u00e0 kh\u00f4ng thay \u0111\u1ed5i h\u01b0\u1edbng. \u0110i\u1ec3m O \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u00e8n \u1ed1ng k\u00ednh<\/p>\n<p dir=\"ltr\">C\u00e2u 9: \u0110\u1eb7t m\u1ed9t v\u1eadt th\u1ec3 \u00e1nh s\u00e1ng \u1edf tr\u1ecdng t\u00e2m c\u1ee7a \u1ed1ng k\u00ednh kh\u00e1c nhau. T\u00ednh kho\u1ea3ng c\u00e1ch gi\u1eefa \u1ed1ng k\u00ednh v\u00e0 h\u00ecnh \u1ea3nh?<\/p>\n<p dir=\"ltr\">A. F\/2<\/p>\n<p dir=\"ltr\">BF\/3<\/p>\n<p dir=\"ltr\">C. 2f<\/p>\n<p dir=\"ltr\">D. f<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: a<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bai-tap-thau-kinh-phan-ki.png\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bai-tap-thau-kinh-phan-ki-2.png\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u00e2u 10: \u0110\u1eb7t \u0111\u1ed1i t\u01b0\u1ee3ng \u00e1nh s\u00e1ng AB \u1edf ph\u00eda tr\u01b0\u1edbc m\u1ed9t \u1ed1ng k\u00ednh kh\u00e1c nhau v\u1edbi \u0111\u1ed9 d\u00e0i ti\u00eau c\u1ef1 F = 12 cm. \u0110\u1ed1i t\u01b0\u1ee3ng AB c\u00e1ch \u1ed1ng k\u00ednh kho\u1ea3ng d = 8 cm. A n\u1eb1m tr\u00ean tr\u1ee5c ch\u00ednh, bi\u1ebft \u0111\u1ed1i t\u01b0\u1ee3ng AB = 6 mm. H\u00ecnh \u1ea3nh c\u1ee7a AB t\u1eeb \u1ed1ng k\u00ednh l\u00e0 bao nhi\u00eau?<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/thau-kinh-phan-ki-a.jpg\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bai-tap-thau-kinh-phan-ki-3.png\" alt=\"\" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ap_dung_ong_kinh_phan_ky_trong_thuc_te\"><\/span>\u00c1p d\u1ee5ng \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 trong th\u1ef1c t\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng c\u1ee7a \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y c\u1ee7a ch\u00fang ta:<\/p>\n<ul>\n<li dir=\"ltr\">K\u00ednh g\u1ea7n: \u1ed0ng k\u00ednh ph\u00e2n k\u1ef3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra k\u00ednh g\u1ea7n cho nh\u1eefng ng\u01b0\u1eddi b\u1ecb c\u1eadn th\u1ecb. K\u00ednh g\u1ea7n g\u1ea7n gi\u00fap nh\u1eefng ng\u01b0\u1eddi c\u1eadn th\u1ecb nh\u00ecn th\u1ea5y c\u00e1c v\u1eadt th\u1ec3 xa.<\/li>\n<li dir=\"ltr\">K\u00ednh t\u1eeb t\u00ednh: K\u00ednh t\u1eeb t\u00ednh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb m\u1ed9t \u1ed1ng k\u00ednh kh\u00e1c nhau v\u1edbi ti\u00eau c\u1ef1 ng\u1eafn. K\u00ednh l\u00fap gi\u00fap ch\u00fang ta nh\u00ecn th\u1ea5y c\u00e1c v\u1eadt nh\u1ecf.<\/li>\n<li dir=\"ltr\">M\u1eaft: \u0110\u00f4i m\u1eaft c\u1ee7a Ch\u00faa \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 quan s\u00e1t m\u1ecdi ng\u01b0\u1eddi trong v\u00e0 ngo\u00e0i nh\u00e0. \u0110\u00f4i m\u1eaft c\u1ee7a Ch\u00faa s\u1eed d\u1ee5ng c\u00e1c \u1ed1ng k\u00ednh kh\u00e1c nhau \u0111\u1ec3 t\u1ea1o ra m\u1ed9t h\u00ecnh \u1ea3nh \u1ea3o thu nh\u1ecf c\u1ee7a ng\u01b0\u1eddi tr\u01b0\u1edbc c\u1eeda.<\/li>\n<li dir=\"ltr\">K\u00ednh hi\u1ec3n vi: K\u00ednh hi\u1ec3n vi s\u1eed d\u1ee5ng \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 \u0111\u1ec3 t\u1ea1o ra h\u00ecnh \u1ea3nh \u1ea3o ph\u00f3ng \u0111\u1ea1i v\u1eadt nh\u1ecf.<\/li>\n<li dir=\"ltr\">Camera: M\u00e1y \u1ea3nh s\u1eed d\u1ee5ng \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 \u0111\u1ec3 t\u1ea1o h\u00ecnh \u1ea3nh \u1ea3o thu nh\u1ecf c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng tr\u00ean phim.<\/li>\n<li dir=\"ltr\">K\u00ednh thi\u00ean v\u0103n: K\u00ednh thi\u00ean v\u0103n s\u1eed d\u1ee5ng c\u00e1c \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 \u0111\u1ec3 t\u1ea1o ra h\u00ecnh \u1ea3nh \u1ea3o thu nh\u1ecf c\u1ee7a c\u00e1c v\u1eadt th\u1ec3 t\u1eeb xa.<\/li>\n<li dir=\"ltr\">V\u1ecb quang h\u1ecdc: \u0110\u1ed3ng h\u1ed3 \u0111o t\u1ea7m nh\u00ecn s\u1eed d\u1ee5ng \u1ed1ng k\u00ednh kh\u00e1c nhau \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 c\u1eadn th\u1ecb c\u1ee7a m\u1eaft.<\/li>\n<li dir=\"ltr\">M\u00e1y quang ph\u1ed5: Quang ph\u1ed5 s\u1eed d\u1ee5ng \u1ed1ng k\u00ednh kh\u00e1c nhau \u0111\u1ec3 ph\u00e2n t\u00edch \u00e1nh s\u00e1ng th\u00e0nh c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01a1n s\u1eafc.<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Hy v\u1ecdng r\u1eb1ng, v\u1edbi th\u00f4ng tin m\u00e0 kh\u1ec9 \u0111\u00e3 \u0111\u1ec1 c\u1eadp trong b\u00e0i vi\u1ebft v\u1ec1 \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3, ch\u00fang s\u1ebd t\u00edch l\u0169y ki\u1ebfn \u200b\u200bth\u1ee9c h\u1eefu \u00edch, h\u1ed7 tr\u1ee3 qu\u00e1 tr\u00ecnh h\u1ecdc t\u1eadp v\u00e0 t\u1ef1 h\u1ecdc m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t.<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5189%\">\n<p style=\"text-align: center\">Gi\u1ea3i ph\u00e1p n\u00e0y gi\u00fap tr\u1ebb ph\u00e1t tri\u1ec3n t\u01b0 duy v\u00e0 ng\u00f4n ng\u1eef to\u00e0n di\u1ec7n v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m to\u00e1n h\u1ecdc + Vi\u1ec7t Nam + ti\u1ebfng Anh v\u1edbi gi\u1ea3m gi\u00e1 t\u1edbi 50% ng\u00e0y h\u00f4m nay.<\/p>\n<p style=\"text-align: center\">\n<p><img loading=\"lazy\" decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/timhieungay.png\" alt=\"\" width=\"185\" height=\"38\"><\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u1ed0ng k\u00ednh ph\u00e2n k\u1ef3 l\u00e0 m\u1ed9t trong nh\u1eefng n\u1ed9i dung quan tr\u1ecdng trong ph\u1ea7n h\u00ecnh h\u1ecdc. V\u1eady \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3, t\u00ednh ch\u1ea5t v\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 v\u1ebd \u1ed1ng k\u00ednh ph\u00e2n k\u1ef3 kh\u00e1c v\u1edbi c\u00e1c lo\u1ea1i th\u1ee7y tinh kh\u00e1c l\u00e0 g\u00ec? H\u00e3y t\u00ecm hi\u1ec3u th\u00f4ng qua b\u00e0i vi\u1ebft sau \u0111\u00e2y. H\u00e0ng tri\u1ec7u tr\u1ebb em&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-19290","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/19290","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=19290"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/19290\/revisions"}],"predecessor-version":[{"id":25005,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/19290\/revisions\/25005"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=19290"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=19290"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=19290"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}